Science
Reproduction
प्रजनन
In this Class 10 Science topic from the “World of Living” chapter, students explore how organisms produce new individuals and why reproduction is essential for the continuation of life. They compare asexual and sexual reproduction, study reproductive processes in plants and humans, and understand puberty, the human reproductive system, fertilisation, menstruation, and basic reproductive health. The topic also introduces contraception and the role of responsible choices in preventing unwanted pregnancy and sexually transmitted infections.
Practice questions
What is the main reason for increased variation among offspring in sexual reproduction?MediumLevel 25Why is reproduction considered a life process even though it is not immediately necessary for the life of one individual organism?HardLevel 25If genetic copying does not occur at all during reproduction what will be the main problem in forming offspring?HardLevel 25Why can small variation during genetic copying sometimes be useful?HardLevel 25Why are offspring in asexual reproduction very similar to the parent?HardLevel 25What is the strongest reason for greater variation in sexual reproduction?HardLevel 25On what basis is binary fission correctly distinguished from multiple fission?HardLevel 25Binary fission in Amoeba is not in a fixed plane but it is in Leishmania. What is the reason?HardLevel 25How does spore formation in Rhizopus help survival in unfavourable conditions?HardLevel 25Budding in Hydra is clear evidence of what?HardLevel 25What is the subtle difference between fragmentation and regeneration?HardLevel 25What is the reason a cut piece of Planaria can form a complete organism?HardLevel 25Why do plants produced by vegetative propagation usually have similar traits?HardLevel 25Why is vegetative propagation especially useful in agriculture for plants that do not produce seeds?HardLevel 25Production of many plants from a small tissue in tissue culture is based on which idea?HardLevel 25Which statement is most correct about genetic variation in self pollination and cross pollination?HardLevel 25After pollination which structure most directly helps carry the male gamete for fertilisation?HardLevel 25If pollen grains reach the stigma but pollen tube does not form why will fertilisation be affected?HardLevel 25What is the correct fate of ovary and ovule after fertilisation in a flower?HardLevel 25Why is formation of fruit after seed formation useful for a plant?HardLevel 25